Chain & Sprocket Kit Contents: 12T Front Sprocket - SPF27912C 50T Rear Sprocket - SPR28950C 110 Link RK Chain - RKP520SOX110 RK Kit Box - SPRKITBOXRK chain and sprocket kits are the perfect drive maintenance kit for your bike including a strong and durable 12T front and 50T rear steel sprocket constructed from SCM420 chromoly steel alloy (front) & C45 high carbon steel with a electroplated Zinc finish (rear) paired with a high-quality O-ring RK chain this kit has everything you need to replace your old warped and stretched chain and sprockets. The perfect alternative to expensive OEM replacements while designed to meet and exceed OEM specifications. Supplied in presentable packaging with a carry handle for convenient transportation.About the Chain:RK's traditional round O ring chain is a convenient blend of performance and affordability. SO series chains are suitable for low to mid-range CC motorcycles that came from the factory with sealed chains. Manufactured with hi-carbon alloy steel for strength and durability with nitrite butadiene O-rings that seal in lubrication and deliver smooth power with minimal drag and horsepower loss. Fits: Honda CRF230F 2003-2020